Vanadinite
Mibladen, Morocco
This specimen measures 25cm x 13cm x 8.5cm
Vanadinite Pb5(VO4)3Cl
Vanadates; lead chlorovanadate, sometimes with small amounts of arsenic
Color and Luster: Ruby-red, orange, brown, yellow, multicolored; greasy, adamantine, resinous; streak white, pale yellow
Hardness: 3
Cleavage: None
Fracture: Uneven, conchoidal, brittle
Crystals: Hexagonal; usually small prismatic crystals, sometimes hollow; also fibrous, incrusting, compact, globular
Note:Specimen donated by James Riddleburger
Photo by Mary Sutherland
Descriptions taken from
The Audubon Society Field Guide to North American Rocks and Minerals